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Diffstat (limited to 'src/devices/bus/coco/coco_orch90.c')
-rw-r--r--src/devices/bus/coco/coco_orch90.c85
1 files changed, 85 insertions, 0 deletions
diff --git a/src/devices/bus/coco/coco_orch90.c b/src/devices/bus/coco/coco_orch90.c
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+++ b/src/devices/bus/coco/coco_orch90.c
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+// license:BSD-3-Clause
+// copyright-holders:Nathan Woods
+/***************************************************************************
+
+ orch90.c
+
+ Code for emulating the CoCo Orch-90 (Orchestra 90) sound cartridge
+
+ The Orch-90 was a simple sound cartridge; it had two 8-bit DACs
+ supporting stereo sound. The left channel was at $FF7A, and the right
+ channel was at $FF7B
+
+***************************************************************************/
+
+#include "emu.h"
+#include "coco_orch90.h"
+#include "sound/dac.h"
+
+static MACHINE_CONFIG_FRAGMENT(coco_orch90)
+ MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
+ MCFG_SOUND_ADD("dac_left", DAC, 0)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 1.0)
+ MCFG_SOUND_ADD("dac_right", DAC, 0)
+ MCFG_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 1.0)
+MACHINE_CONFIG_END
+
+//**************************************************************************
+// GLOBAL VARIABLES
+//**************************************************************************
+
+const device_type COCO_ORCH90 = &device_creator<coco_orch90_device>;
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// coco_orch90_device - constructor
+//-------------------------------------------------
+
+coco_orch90_device::coco_orch90_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, COCO_ORCH90, "CoCo Orch-90 PAK", tag, owner, clock, "coco_orch90", __FILE__),
+ device_cococart_interface( mconfig, *this )
+{
+}
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void coco_orch90_device::device_start()
+{
+ m_left_dac = subdevice<dac_device>("dac_left");
+ m_right_dac = subdevice<dac_device>("dac_right");
+}
+
+//-------------------------------------------------
+// machine_config_additions - device-specific
+// machine configurations
+//-------------------------------------------------
+
+machine_config_constructor coco_orch90_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( coco_orch90 );
+}
+
+/*-------------------------------------------------
+ write
+-------------------------------------------------*/
+
+WRITE8_MEMBER(coco_orch90_device::write)
+{
+ switch(offset)
+ {
+ case 0x3A:
+ /* left channel write */
+ m_left_dac->write_unsigned8(data);
+ break;
+
+ case 0x3B:
+ /* right channel write */
+ m_right_dac->write_unsigned8(data);
+ break;
+ }
+}